Christian emil arno clatts



Oct. 7, 1930.

c. E. A. CLAUS 1,777,430 TYPEWRITEH CALCULATING MA CHINE Filed Marph 9, 1927 I 21 V611 for:

CZ)? l/aus $642 By 777% W}.

- Patented Oct. 7, 1930 UNITED STATES PATENT orFrca CHRISTIAN EMIL ARNO CLAUS, OF CHEMNITZ, GERMANY, ASSIGNOR TO WANDERER WERKE, VOBM WINKLEOFER & JAENICKE, A. G., O]? SCHONAU, NEAR CHEMNITZ,

GERMANY TYPEWRITER CALCULATING MACHINE Application filed March 9, 1927, Serial No.

This invention relates to typewriter calculating machines and has for its object to provide a mechanism for transmitting the numeral values set up by the depression of keys to the counting mechanism, the main transmission members being a stepped roller and a setting wheel capable of sliding longitudinally of the said roller.

The known arrangements of this kind, in which the sliding motionof the setting wheel for setting it in correspondence with the numeral value with respect to the'stepped roller is derived from the motion of the key through cams, slotted guides, toothed gearing and the like, besides being extremely compli cated have the disadvantage that a considerable expenditure of force is required for depressing a key, thus also increasing the time required for carrying out the various calcplatmg operations.

In contradistinction thereto the arrangement according to the present invention is very simple in construction, has a very light touch and enables the various calculations to y be carried out very rapidly.

drive which can be put in operation in a known manner, for instance on a.key being I depressed by raising the bars of a tabulatorlike arrangement. The raised tabulator barforms a stop for checking the sliding motion of the setting wheel in correspondence with the numeral value set up by the depression of the key, this sliding motion taking place by utilizing the untoothed partjof the stepped roller, so that the latter can have a rotating action on the setting wheel only after the sliding motion is completed.

In the accompanying drawing a c0nstruc tional form of the arrangement according to the present invention is shown; r

Fig. 1 being a plan view of the mechanism for transmitting the numerical values.

I Fig. 2 a cross-section on line" 2- 2-of Fig. 1,

Fig. 3 a front elevation of a detail of Fig, 1. Figure 4 is an end view of a detail.

174,018, and in Germany March '11, 1926.

In the checks 3' for journalling the shaft 1 of the stepped roller and the other transmission shafts of the calculating mechanism, which are fixed on the supportin plate 2, a bar'4 is arranged so 'as'to be sli able longitudinally parallel to the axis of the stepped roller. A forked member 5 on the bar 4 engages on either side of the setting wheel 7 which meshes with the stepped roller 6, which wheel 7 is mounted on the driving shaft 8 so as to be capable of sliding, but not of rotating thereo At the left-hand end of the bar 4 is a stop member 9 which, whenthe bar is released by the driving mechanism to be described below consequently is displaced to the right under the action of a tension spring 10. The movement of the bar 4 is' checked by means of stop bars 11 which are operatively connected to the numeral keys by means of intermediate connecting members, so as to be capable of. being raised into the path of the stop member 9 by the depression of the numeral keys, the sliding motion of the bar and of the setting wheel being thus checked in the osition corresponding to the numeral values set up by the depression of the key.

In the normal position of the parts, a second stop member 12 on the bar 4 under the action of the spring 10 engages with the pin 13 on the rotary disc14, the said pin and rotary disc being in the position shown in Figure 1. the hub 15 of a toothed wheel 16, the rim 17 of the rotary disc being connected to the hub by a spiral spring 18.

By a toothed 'wheel 19 which meshes with the toothed wheel 16 and is of the same size as the latter and a -bevel wheel ,gear 20 the toothed wheel 16 is inoperative connection with the driving shaft Lof the stepped roller d 6, the ratio of transmission being 1: 1.

The rotary disc is mounted loosely on a The driving s haft l, which by means of a known driving mechanism performs one revolution at each depression of the key or for each calculating operation, thus also causes the stepped roller 6 to perform one revolution.

The driving shaft 1 produces through toothed wheel gearing 24 a single revolution of a cam disc 25 of the shape shown in end view in Fig. 4. Against this cam disc 25 there rests, when the mechanism is at rest and the disc is in the position shown in Fig.

4, the roller on the end of a lever 26 mounted on a shaft'21. On the shaft 21 is mounted a lever 22 which is at right angles to the lever 26 and which, when the roller on the lever 26 rests on the circular part of the periphery of the cam disc 25 when the latter is turned in the direction of the arroww is rocked into the path of a boss 23 on the rotary disc-14 at 90 to the pin 13 and snaps back into the the stepped roller 6, one tooth of the setting wheel.7 is in engagement between the longest and shortest tooth of the stepped roller. As the rotary-disc 14 is operatively connected to the shaft 1 of the stepped roller, the former will also be rotated, the pin 13 allowing the bar 4 to move to the right, carrying the setting wheel 7 along withit; If not prevented by the extreme left hand stop bar 11 from doing so,the wheel 7 "will be moved to the right out of engagement'in the gap between the shortest and longest teeth and will be slid along the stepped roller out of engagement with the teeth thereof.

During he first half revolution of the toothed wheel 16, i. e. until the boss 23 strikes the lever 22, the rotary disc 14 will be carried round, the pin 13 releasing the stop member 12, so that the bar4 is slid-to the right" under the action of the spring 10, until the stop member 9 thereon strikes a ainst the raised stop bar 11. This causes he setting wheel to be slid to that part of the stepped ,roller 6 which corresponds to the numeral value set up by "the depression of the key. If the setting wheel'7 isprevented by the extreme left hand stop member 11 from moving out of engagement with the teeth of the stepped roller, then all the teeth of the stepped rollerwill act on the setting wheel and will turn it through an angle corresponding to nine teeth, the extreme left hand stop member 11 being operatively connected to the figure nine numeral key. If, on the other hand, a stop member belonging to a numeral key having'a lower value be moved into the path of the stop member 9, the bar 4 will move to the right under the control of the ,pin 13 on the disc 14. As the circumferential velocity of the pin 13 is at least twice that of the teeth of the stepped roller, the sliding motion of the setting wheel 7 takes place more rapidly than the engaging movement of the teeth, so that'the setting wheel comes out of engagement with the teeth of the stepped roller. This sliding motion takes place exceedingly rapidly along the untoothed portion of the stepped roller, so that during the sliding motion the stepped roller cannot act on the setting wheel. After the completion'of the sliding motion, the numeral value set up is transmitted by the stepped roller to the setting wheel and by the latter through the shaft 8 to the counting mechanism.

During the second half of the revolution I of the toothed wheel 16 the spiral spring 18 is stressed, while the rotary disc 14 is kept stationary by the lever arm 22 engaging with the boss 23. p

Immediately before the completion of the revolution of the toothed wheel 16, as already explained above, the roller on the lever 26 snaps back into the position shown in Figure 4 and the lever arm 22 releases the boss 23, whereby the rotary disc 14' under the action of the unwinding spiral spring 18 rapidly performs the second half of its revolution, i. e. snapsback into the initial position (Fig. 1).

At the same time the pin 13 strikes against the stop member 12 and returnsthe bar 4 with its stop member 9 and the setting wheel 7 rapidly into the initial position, in opposition to the spring, 10.

It should be understood. that'the entire operation described, which takes place on a numeral key being depressed, occupies no -more than a fraction of a second.

What I claim is:

1. In a typewriter calculating machine, a device for transmitting to a counting mechanism the numerical values setup by the numeral keys, comprisin the combination with a stepped rollercapab e of being operativelymeans operatively connected to the numeralkeys for arresting the slidin movement of forth.

2. In a typewriter calculating machine, a

device for transmitting to a counting mech-- anism the numerical values set up by the numeral keys, comprising the combination with a stepped roller capable of being operatively connected to and disconnected from a powerdriving mechanism and a setting wheel operthe setting wheel, as and for t e purposes set atively connected to the stepped rollei: for

' transmitting the motion of said roller to the atively connected to said sha counting mechanism, said setting wheel being capable of sliding longitudinally of said stepped roller, of means operatively connected totthe said power driving mechanism for sliding the settingwhel simultaneolisl with the rotary movement of the stepped ro er out of engagement with the teeth of said step roller, said sliding means comprising a ar engaging the setting wheel, a stop member on said bar and tabulator bars operativel con nected to the numeral keys and capa le of being raised by said numeral keys into the path of the said stop member for arrestin the sliding movement-of the setting whee whereby the stepped roller can only actuate the setting .wheel'after the sliding motion of the latter is completed.

3. In a typewriter calculating machine, a

device for transmitting to a counting mechanism the numerical values set up by the numeral keys, comprising the. combination with a shaft capable of being operatively connected to and disconnected from a power drivingmechanism, a stepped roller fixed on said shaft and capable ofnerforming one revolution for each depression of a numeral key, and a-setting wheel operatively connected to the stepped roller for transmitting the motion of said roller to the counting mechanism, said-setting wheel being capable of sliding longitudinally of said stepped roller,-

of 'a slidable actuating member operatively connected to said setting wheel, a sprin connected to said actuating member and a apted to displace actuating member and setting wheel 1n one direction into a position for transmitting the r uired motion to the countingmechanism, 'splacifi means operand in engagement with said actuating member adapted to displace said member and setting wheel in the opposite. direction against the action of said spring, said displacing means being capable of allowing said actuating member to slide under the action of saidspring si-' nected to and disconnected from apower driv- I v setting stepped roller for transmitting the motion of said roller to the counting mechanism, said setting wheel being capable 'ofsliding longi- -tuclinally of said stepped roller, of a slidable bar operativelye connected to said setting wheel "so as to ca able" of sliding the latter, a toothed wheel aving a hub, and operatively connected to the shaft of the stepped rollerso, as to be capable of rotation by said shaft with a transmission ratio of 1 1, a rotary disc on said hub, a spiral spring connected to said hub and to said rotary disc, a pin on said rotary disc, a spring connected to said bar and adapted to displace said-bar and :wheel in one direction into position for transmitting the required motion to the coun mechanism, a stop member on said bar capable of engaging said pin on the rotary disc'under the action-of the spring connected to the bar, a boss on said rotary disc,

a stop member 22 operativel connected to said shaft-of thestepped r0 er so as to be capable of being movedinto the path of the boss on said rotary'disc after said disc has turned through half a revolution after the depression of a numeral key, so as to stopthe movement of the rotary disc and stressthg spiralgspring during the second half of the revolution saidfi stop member being movable out of the path of said bow towards the end of the revolution of the said toothed wheel so as to release the boss and allow the rotary disc to' complete the second half of its revolution under the action of the spiral spring and returntheslidable bar to its initial position, and means operatively connected to'the numeral 'keys' for arresting said actuating member and setting wheel, as and for the'purposes set forth.

In-testimony whereof I have signed my name to this s ecificatitin. V

'CHRISTIA EMIL ARNO CLAUS.

ing mechanismta step roller fixed on said 7 shaft and capa le'of orming one revolution foreach depression ofa numeral ke and a setting. wheel operatively conn to the 

